P. Schmoldt, PhD - MTNet - DIAS

9. Data collection and processing
Station
Reference station(s) used for processing of
Broadband Long-period data
pic001 pic020 pic001, pic003, pic005, pic007, pic011, pic013, pic015
pic002 pic003 -
pic003 pic037 pic001, pic003, pic005, pic007, pic011, pic013, pic015
pic004 pic004 -
pic005 pic007 pic001, pic003, pic005, pic007, pic011, pic013, pic015, pic017
pic006 pic003 -
pic007 pic005 pic001, pic003, pic005, pic007, pic011, pic013, pic015, pic017
pic009 pic003 pic009, pic011, pic013, pic015, pic017, pic019, pic022, pic023
pic011 pic020 pic001, pic003, pic005, pic007, pic011, pic013, pic015, pic017, pic019
pic013 pic020 pic001, pic003, pic005, pic007, pic009, pic011, pic013, pic015, pic017, pic019, pic023
pic015 pic003 pic001, pic003, pic005, pic007, pic009, pic011, pic013, pic015, pic017, pic019, pic023
pic017 pic003 pic005, pic007, pic009, pic011, pic013, pic015, pic017, pic019, pic022, pic023
pic019 pic003 pic009, pic011, pic013, pic015, pic017, pic019, pic022, pic023
pic020 pic037 -
pic022 pic003 pic009, pic017, pic019, pic022, pic023, pic027
pic023 pic003 pic009, pic013, pic015, pic017, pic019, pic022, pic023, pic027
pic025 pic003 pic025, pic027, pic029, pic031, pic033, pic035, pic037, pic041
pic027 pic003 pic022, pic023, pic025, pic027, pic029, pic031, pic033, pic035
pic029 pic003 pic025, pic027, pic029, pic031, pic033, pic035, pic037, pic040, pic041
pic031 pic031 pic025, pic027, pic029, pic031, pic033, pic035, pic037, pic040, pic041
pic033 pic033 pic025, pic027, pic029, pic031, pic033, pic035, pic037, pic040, pic041
pic035 pic035 pic025, pic027, pic029, pic031, pic033, pic035, pic037, pic040, pic041
pic037 pic003 pic025, pic029, pic031, pic033, pic035, pic037, pic040, pic041
pic040 pic003 pic029, pic031, pic033, pic035, pic037, pic040, pic041
pic041 pic003 pic025, pic029, pic031, pic033, pic035, pic037, pic040, pic041
Tab. 9.3.: Station pairs for remote reference processing of PICASSO Phase I data. For processing of broadband stations remote (or
local) reference sites are chosen based on the quality of resulting response estimates; for long-period processing all stations with
overlapping recording times are used (multi-site remote referencing). See Table 9.1 Figure 9.2 for location and recording times of all
stations.
can be detected by comparing the three E-field estimates with each other. The optimal
channel (with respect to data quality), or a time-segment of a channel, can then be determined
for usage in further processing steps. Erroneous records can be due to either damaged
electric cables connecting the electrode pair, or disturbance of one of the electrodes
(e.g. polarisation effects or very localised small-scale features). Figure 9.4 illustrates one
case in which the centre-south (South) electrode pair underwent severe disturbance during
the 21st of October whereas the north-centre (North) pair suffers from the effect of
slow saturation of the northern electrode at the beginning of the recording time. Both circumstances
affect the combined north-south electrode pair data (Average). Furthermore,
the two electrode pairs provide different base levels for the estimated electric field. From
these three time-series datasets an optimal subset is culled based on the coherence with
the related orthogonal magnetic field measurements (see Section 6.2 for details on coherence
estimation in MT data processing). Among others, this is to ensure that the obtained
change in electric field behaviour, measured by the centre-south dipole (South), is indeed
due to disturbance and does not originate from natural sources. The effect related to the
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